package com.example.facadepattern;

public class SoundSystem {

    public void on() {
        System.out.println("音响开启");
    }
    public void off() {
        System.out.println("音响关闭");
    }
    public void setVolume(int volume) {
        System.out.println("音响音量设置为" + volume);
    }
}
